Ments



cHAELES H. HOPKINS, oE LYNDoNvILLE, VERMONT, ASSIcNoE, Bv MESNE ASSIGN- MENTS, To HIMSELE AND H. A. ALEEN, 0E SAME PLAGE.

IMPROVEMENT IN BOLTS.

The Schedule referred to in these Letters Patent and making part ofthe same To alLwho/m may conce/m Be it known that I, CHARLES H. HOPKINS, of Lyndonville, in the county of Caledonia, and State of Vermont, have invented a new and improved Locking-Pin and I do hereby declare that the following is a full, clear, and exact description thereof, which will enable others skilled in the art to make and'use the same, reference being had to the accompanying drawings, forming part of this specification, in which Figure l is a sectional view of my invention, with the permanently-remaining toggle-key employed.

Figures 2 and 3 are detail views of removable togglekeys, which may be used. Y

Similarpletters of reference indicate corresponding parts.

This invention has for its object, to provide a device v for locking doors, boxes, and the like, either temporarily or permanently, and may also be found useful in connecting parts of machinery.

It consists, in general terms, of a pin, bolt, or rod, having a permanent head at one end, forming part of the saine,while the other end is made hollow, by being bored longitudinally, and formed with a mortise or opening at right angles to the bore, which mortise opens into the bore from side toside of the pin or bolt.

4In combination with this bore, are one or two catchbolts, which t loosely in the bore, so as to move freely therein, and which are actuated by coiled springs, or rubber plugs, to press against the toggle-key, which is inserted in the mortise or opening aforesaid, and catch in the notches of lthe said key.

My invention will be better understood by referring to the drawings, where'A is a pin, rod, bolt, or bar, as circumstances may require, and may be of any suitable length or cross-section.

. Within the bore of the same are the catches a a', behind which are the springs b, which, in practice, may be of metal, or rubber, or other elastic matter capable of actuating the bolts to bear against the toggle-key B, as shown.

This key is formed with a head, e, and a parted end, j, and two lateral notches, having abrupt shoulders, h.

The catches are arranged so as to present their ends Within the opening or mortise, so that the point f of the key, in entering,`will pass between and separate them. When the shoulders h have passed the catches, the latter will be pressed into the notches, and thus prevent the key from being withdrawn.

The head e prevents the key from being pushed should be slightly conical, or rounded, so that the keys will enter readily between them.

The bore in the pin is closedwith a screw-plug, d, which aifords a resist-ance for the spring of the catch a. It will be observed that this latter catch maybe omitted without materially impairing the efficiency of Lthe device. In that case, the screw-plug would extend up to and be ilush with the lower side of the mortise, and the point f of the key would be bevelled, or tapered from one side only. The catch a would then impinge against the end of the plug (l, before the key was inserted, and would be moved back by the tapered side of the keys.

The keys would, in this latter case require but one notch.

This latter modification would,v in some cases, be preferable to the former; and I desire-to be understood as not limiting my invention to the combination of two catches, as shown in the drawings.

When the key B is once inserted'7 it cannot be withdrawn. v

Having thus described my invention,

I claim as new, and desire to secure by Letters The lock-bolt A, having thel locking-pins a (one or more) arranged therein, with a transverse mortise, for

the insertion "of the keys B, 0,101" D, all constructed and arranged to operate substantially as and for the 

